Relayer CLI for MsgConnectionOpenConfirm

[adizere]

Crate

relayer-cli and probably relayer

Proposal

Implement support for the following command:

relayer tx raw conn-confirm <to-chain-B> <remote-chain-A> <conn-id-on-A>

• sends request to local client for chain-A to retrieve latest header header_A with height ha
• makes the following queries to chain-A at height ha-1:
  - the connection with id conn-id-on-A with proof, stores results in connection and ack_proof
• sends a MsgUpdateState to chain-A with:

        client_id = client-A-on-B, 
        header = header_A, 
        signer = get_account(to-chain-B)

• sends a MsgConnectionOpenAck to chain-A with:

        connection_id = connection.counterparty_connection_id,
        ack_proof
        proofs_height=ha,
        signer = get_account(to-chain-B)

Note: get_... are functions that retrieve information from the relayer configuration.

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[ebuchman]

Believe this was done in #397